Primer for gas engines



Jan. 2,1934 A, LA R. PARKER 1,942,255

PRIMER FOR GAS ENGINES.

Filed Allg. 30, 1933 Patented Jan. 2,/1934 UNITED STATES PATENT '0I-FICE The invention relates to new and useful improvements in a "primer for gas engines. In my co-pending application Serial Number 660,055, flled March 8, 1933, patented Nov. 14, 1933, No. 1,934,878, I have shown and described a primer for gas engines which may be used for distributing the explosive fluid to a selected cylinder or cylinders. The primer includes a spring seated check valve disposed between the pump andthe pipe through which the explosive fluid is being dis,- pensed. There is also shown and described said application means for preventing the explosive fluid from being drawn from the supply pipe through the pump into the dispensing pipe by a suction pull on the dispensing pipe when the pump is idle.

'l An object of the present invention is to provide a primer of the abovetype with means whereby a diaphragm subjected at one side thereof to atmospheric pressure and at the other side thereof to the pressure maintained on the dispensing pipe, may be utilized for forcibly seating the check valve through the action of the suction pull of the dispensing pipe thereon, and thereby prevent the explosive fluid from being drawn from the supply through the pump.

A further object of the invention is to provide a primer of the above type, wherein a ball check valve is maintained seated by a piston yieldngly pressed against the same and wherein said piston, is engaged by the diaphragm and caused to forcibly seat the ball when the inner face of the diaphragm is subjected to a suction pull on the dispensing pipe. I

'I'hese and other objects will in part" be obvious and will in part be hereinafter described.

In the drawing which shows by way of illustration one embodiment of the invention:

Fig. 1 is a vertical sectional view through a primer embodying the improvements.

Fig. 2 is an enlarged vertical sectional view through the lower portion of the primer.

Fig.- 3 is a view'showing more or less diagrammatically the construction of the dispensing housing'for a one-way primer.

` Fig. 4 is a view similar to Fig. 3, but showing the construction of they housing for a two-way primer.

Fig. 5 is a view similar to Fig. 3, but showing the construction of the housing for a three-way primer.

The primer embodying the invention includes a pump casing 1, which is provided with a flange 2 for the mounting of the casing; said pump casing .is provided with a valve housing 3 which as shown is formed integral therewith; said valve housing 3 is provided with-a pipe connection 4 to which an inlet pipe leading to a supply may be attached; said pipe connection is provided with a plug 5 having a port therethrough and a ball check valve '60 6 is yieldingly forced against a. seat on said plug 5 by a spring 7.

Attached to the valvev housing are pipe lconnections to which in turn are connected the dispensing pipe or pipes. As shown in Figs. 1 and 3, 65

there is a single pipe connection only indicated at 8, while in Fig. 4 there are twopipe connectionsl 8 and 9, to which independent dispensing pipes are connected. In Fig. 5 thereare three pipe connections 8, 9 and 10 and independent dispensing pipes will be attachedto each one' oi these connections. Located within the valve housing 3 is a distributing valve 11; saiddistributing valve 11 is provided with a distributing port 12; said valve 11 is tapered and is seated by means of aspring 13. This valve 11 may be turned so as to bring the distributing port. 12 into register with either the pipe connection 8 or 9 when a two-way primer is used and it imay' be likewise turned so as'to be brought into regisf. 80

ter'with any one of the pipe connections 8, 9 and 10 when a three-way primer is used. The v alve llis provided with a port 14 leading to the pump casing 1. There is a port 15 leading from they pump casing to the chamber in the pipe connec'- 85 which is adapted to engage the distributing valve when the piston is at the extreme inner end of its movement. This vconnection between the piston and the valve is such that a turning of the piston will shift the valve. This provides a means whereby the piston may be used for setting the distributing valve so as vto bring the port 12 into register with the desired dispensing pipe. After the valve is set, then the piston may be released therefrom and used for drawing the explosive iiui`d from the supply pipe and for dispensing 10 the liquid to the desired place for use through one of the dispensing pipes. 'f At the inner end of the port 14 in the distributing valve, there is a valve seat 18 with which a stainless steel ball 19 makes contact. This pro- U0 vides a check valve between the pump and the dispensing pipe. The ball is held yieldingly against the seat by means of a piston 20. Said piston 20 is guided in part by the valve 11 and in part by a cap plate 21 secured to the valve housing and closing the lower end of the chamber in which the valve 11 is located. The spring 13 which yieldingly holds the valve 11 in position in the chamber, bears at one end against the valve 11 and at its other end against the cap plate 21. The cap plate 21 is provided with a recess 22 in its under face and the piston 20 is formed with a laterally extending head 23 which moves freely in this recess 22. The piston 20 is provided 4with a bore forming a chamber 24 in which is located a spring 25. This bore or chamber is open at its lower end and the spring in the chamber bears at its upper end against the piston and at its lower end against a exible diaphragm 26. This exible diaphragm 26 extends all' the Way across the cap plate 21 and closes and seals the recess 22. Outside of the diaphragm is a metal disk 27 which is preferably domeshaped and this disk is secured as shown in the drawing to the cap plate 21 by bending an upstanding flange 28 inwardly and downwardly against the disk. This will clamp the diaphragm against the cap plate so as to produce a tight seal. There is an opening 29 through the disk so that the outer face of the flexible diaphragm is subjected to atmospheric pressure.

There is a port 30 through the piston 20, connecting the chamber 24 with the dispensing pipe through which the explosive fluid is being dispensed. 'Ihis connection through the port 30 places the inner sideof the diaphragm under the same pressure as is maintained on the dispensing pipe. If there is a suction pull on the dispensing pipe creating a pressure less than atmospheric pressure, then the diaphragm bearing against the head of the piston will force the piston against the ball 19 and forcibly seat the ball.

Normally the piston 20 is raised by the spring 25 into contact with the ball and yieldingly holds the ball against the seat 18. When the piston is moved downwardly for dispensing the explosive uid, the ball will be moved away. from its seat allowing the'fluid to pass through the port 12 to the selected dispensing pipe. On the suction stroke of the piston the ball check valve 19 will be drawn against its seat and this insures the drawing of the explosive fluid from the supply past the check valve 6. The check valve 6 is of course seated on the inward stroke of the piston so as to cause the explosive fluid drawn into the pump casing to be forcibly discharged by the valve 19 into the dispensing pipe.

When the pump is idle a suction pull on a distributing pipe will create a pressure on the chamber 24 which is less than atmospheric pressure.

and this in turn will create a differential pressure on the diaphragm which will force theY diaphragm against the piston head and the piston against the ball, thus forcibly seating the ball and this will prevent the suction pull on the dispensing pipe from drawing the explosive fluid from the supply through the pump.

It is obvious that minor changes in the details of construction and the arrangement of parts may be made without departing from thespirit of the invention as setforth in the appended claims.'

llaving thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. A iiuid dispensing device comprising a housing having an inlet port to which a supply pipe is connected and an outlet pipe to which a dispensing pipe is connected, a pump having connection to said housing for drawing fluid from the supply pipe and for delivering the same -to the dispensing pipe, a spring closed check valve between said pump and said dispensing pipe, a diaphragm having one side thereof subjected to atmospheric pressure and the other side thereof subjected to the pressure on the dispensing pipe and means whereby said diaphragm operates on said check valve for forcibly seating the same when the dispensing pipe is subjected to a suc tion pull.

2. A fluid dispensing device comprising a hous'- ing having an inlet port to which a supply pipe is connected and an outlet pipe to which a dispensing pipe is connected, a pump having connection to said housing for drawing fluid from the supply pipe and for delivering the same to the dispensing pipe, a ball check valve between the pump and said dispensing pipe, a piston bearing against said ball, a spring bearing on said piston for yieldingly holding said ball seated, a diaphragm having one side thereof subjected to atmospheric pressure and the other side subjected to the pressure on the dispensing pipe, adapted to contact with said piston when said dispensing pipe is subjected to a suction pull for forcibly seating the ball.

3. A fluid dispensing device comprising a housing having an inlet port to which a supply pipe is connected and an outlet pipe to which a dispensing pipe is connected, a pump having connection to said housing for drawing fluid from the supply pipe and for delivering the same to the dispensing pipe, a ball check valve between the pump and said dispensing pipe, a piston contacting with said ball, a spring bearing against said piston for yieldingly seating said ball, said piston having an extended head, a diaphragm having the inner face thereof adapted to contact with said head and the other ,side thereof open to atmospheric pressure, means for subjecting the inner face of the diaphragmto the pressure on the dispensing pipe whereby said diaphragm operates through said piston on said ball check valve for forcibly seating the same when the dispensing pipe is subjected to a dispensing pull.

4. A fluid dispensing device comprising a heusing having an inlet p ort to which a supply pipe is connected and an outlet pipe to which a dispensing pipe is connected, a pump having connection to said housing for drawing fiuid from the supply pipe and for delivering the same to the dispensing pipe, a distributing valve located in said housing having a port leading to said pump and a port adapted'to be placed in register with the dispensing pipe, a cap plate for closing the chamber in the, housing containing said distributing valve. a spring between said cap plate and said' distributing valve for maintaining said distributing valve in a set position, a spring closed check. valve disposed in said distributing valve between the port leading to the pump casing and ing having an inlet port to which a supply pipe is connected and an outlet pipe to which a dispensing pipe is connected, a pump having connection to said housing for drawing fluid from the supply pipe and for delivering the same to the dispensing pipe, a distributing valve located in said housing having a port leading to said pump and a port adapted to be placed in register with the dispensing pipe. a cap plate for closing the chamber in the housing containing said distributing valve, a spring between said cap plate and said distributing valve for maintaining said distributing valve in a set position, a ball disposed in said distributing valve between the port leading to the pump and the port leading to the dispensing pipe and adapted to engage a seat at the inner end of said rst-named port, a piston adapted to engage said ball for seating the same,

a spring for yieldingly forcing the piston into contact with said ball and means whereby the suction pull on the dispensing pipe will operate on said piston for forcibly seating the ball for preventing explosive fluid from being drawn from the supply through the pump when said pump is idle.

6. A iluid dispensing device comprising a housing having an inlet port to which a supply pipe is connected and an outlet pipe to which a dispensing pipe, is connected. a pump having connection to said housing for drawing duid from the supply pipe and for delivering :he same to the dispensing pipe, a distributing valve located in said housing having a port leading to said pump and a port adapted to be placed in register with the dispensing pipe, a cap plate for closing the chamber in the housing containing -said distributing valve. a spring between said cap plate and said distributing valve for maintaining said distributing valve in a set position, a ballv disposed in said distributing valve between the port leading to the pump andthe port leading to the dispensing pipe and adapted to engage a seat at the inner end Voi.' said first-named port, a piston adapted to engage said ball for seating the same, y 

